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POLITICO 44

"Since election night, our vote margin has steadily increased," Costa said in a statement. "With only a few votes left to be counted, it is clear the election is over. I am honored that the people of our Valley have given me the opportunity to continue serving our communities in Congress.”

Vidak’s campaign did not respond to a request for comment.

Costa found himself in an unexpectedly tight race against Vidak, a tea-party-oriented farmer who criticized the incumbent over his handling of the Central Valley’s water crisis. Vidak, who raised less than $640,000, was boosted by a surge of late spending by Crossroads GPS, a conservative outside group.

The resolution of the 20th District contest leaves just two House races to be decided: California’s 11th District and New York’s 1st District. Democratic incumbents have a narrow lead in each.